PARAVALVULAR LEAK SEALING MECHANISM

摘要

A collapsible and expandable stent body includes a generally tubular annulus section, one or more prosthetic valve elements mounted to the stent body, and a cuff attached to the stent body. The prosthetic valve is operative to allow flow in an antegrade direction but to substantially block flow in a retrograde direction. The prosthetic heart valve may include paravalvular leak mitigation features in the form of first and second sealing members. The sealing members are attached to the cuff and extend circumferentially around an abluminal surface of the stent body. The sealing members each have an open side facing in a first axial direction and a closed side facing in an opposite second axial direction. Flow of blood in the second axial direction will tend to force blood into the sealing members and cause the sealing members to billow outwardly relative to the stent body, helping to mitigate paravalvular leak.

主权项

1. A prosthetic heart valve, comprising:
a collapsible and expandable stent body including a generally tubular annulus section; one or more prosthetic valve elements mounted to the stent body and operative to allow flow in an antegrade direction but to substantially block flow in a retrograde direction through the annulus section; a cuff attached to the stent body; a first sealing member attached to the cuff, the first sealing member extending circumferentially around an abluminal surface of the stent body and having an open side facing in a first axial direction and a closed side facing in a second axial direction opposite to the first axial direction so that a flow of blood in the second axial direction will tend to force blood into the first sealing member and cause the first sealing member to billow outwardly relative to the stent body; and a second sealing member attached to the cuff, the second sealing member extending circumferentially around the abluminal surface of the stent body and having an open side facing in the first axial direction and a closed side facing in the second axial direction so that the flow of blood in the second axial direction will tend to force blood into the second sealing member and cause the second sealing member to billow outwardly relative to the stent body.